CN113489394B - Engine-driven direct-current generator control method and system - Google Patents
Engine-driven direct-current generator control method and system Download PDFInfo
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- CN113489394B CN113489394B CN202110778692.2A CN202110778692A CN113489394B CN 113489394 B CN113489394 B CN 113489394B CN 202110778692 A CN202110778692 A CN 202110778692A CN 113489394 B CN113489394 B CN 113489394B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000009467 reduction Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 84
- 238000011156 evaluation Methods 0.000 claims description 26
- 238000012163 sequencing technique Methods 0.000 claims description 24
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010801 machine learning Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
- F02B63/041—Linear electric generators
Abstract
The invention provides a control method and a system of a direct current generator driven by an engine, wherein the method comprises the following steps: step S1: when the generator generates electricity, detecting whether a carburetor throttle of the engine reaches the maximum, if so, executing the step S2; step S2: starting intervention, controlling the output voltage of a direct current generator driven by an engine to be reduced once by a preset amplitude, and detecting whether the carburetor throttle of the engine reaches the maximum again after the reduction, if so, executing the step S3, otherwise, executing the step S4; step S3: controlling the output voltage of the direct current generator driven by the engine to be reduced once again by a preset amplitude, and executing the step S4 after the output voltage is reduced; step S4: and stopping intervention when the output voltage of the direct current generator is smaller than or equal to a preset first output voltage threshold value. The control method and the system for the engine-driven direct-current generator save electric energy, reduce heating and prolong the service lives of the stepping motor, the engine and the variable-frequency direct-current generator.
Description
Technical Field
The invention relates to the technical field of control of a direct-current generator driven by an engine, in particular to a control method and a control system of the direct-current generator driven by the engine.
Background
At present, a variable frequency direct current generator driven by an engine can supply power to electric equipment and can charge a storage battery at the same time;
when the controller detects that the output voltage U1 of the variable frequency direct current generator is smaller than the set voltage U2, the stepping motor is controlled to rotate anticlockwise, the carburetor of the engine is controlled to increase the throttle, so that the rotating speed of the engine is increased, and the output voltage U1 of the variable frequency direct current generator is increased;
when the controller detects that the output voltage U1 of the variable frequency direct current generator is larger than the set voltage U2, the stepping motor is controlled to rotate clockwise, the carburetor is controlled to reduce the throttle, so that the rotating speed of the engine is reduced, and the output voltage U1 of the variable frequency direct current generator is reduced;
however, in the actual use process, when the electric quantity of the storage battery is smaller, the charging current is larger, and in addition, the electric appliances such as an air conditioner and the like are used, the load required power is possibly far larger than the output power of the variable-frequency direct-current generator, so that the output voltage U1 of the variable-frequency direct-current generator is always smaller than the set voltage U2 of the variable-frequency direct-current generator, and therefore the stepping motor always rotates anticlockwise, namely the stepping motor always is electrified to work, and in fact, the throttle of the carburetor is already maximized;
Therefore, the stepping motor is always in a working state, electric energy is wasted, heating is increased, and the temperature of the whole machine is increased;
in addition, the accelerator is always at the maximum, i.e. the accelerator is turned to the bottom and is in a dead state, so that the engine of the variable-frequency direct-current generator is closed, and the normal power of the engine cannot be exerted, thereby shortening the service lives of the stepping motor and the engine and shortening the service life of the whole variable-frequency direct-current generator.
Disclosure of Invention
The invention aims to provide a control method and a system for an engine-driven direct current generator, which start intervention when the maximum throttle of a carburetor is detected, reduce the output voltage of a variable frequency direct current generator, reduce the throttle of the carburetor, prevent a stepping motor from working all the time, save electric energy and reduce heating.
The embodiment of the invention provides a control method of an engine-driven direct-current generator, which comprises the following steps:
Step S1: when the engine drives the generator to output voltage, detecting whether a carburetor throttle of the engine reaches the maximum, if so, executing the step S2;
step S2: starting intervention, controlling the output voltage of the direct current generator to be reduced once with a preset amplitude, and detecting whether the carburetor throttle of the engine reaches the maximum again after the output voltage is reduced, if so, executing the step S3, otherwise, executing the step S4;
step S3: controlling the output voltage of the direct current generator to be reduced once again by a preset amplitude, and executing the step S4 after the output voltage is reduced;
step S4: and stopping intervention when the output voltage of the direct current generator is smaller than or equal to a preset first output voltage threshold value.
Preferably, the preset amplitude is reduced by 8%.
Preferably, the preset first output voltage threshold is 75% of the output voltage of the direct current generator.
Preferably, the engine-driven direct-current generator control method further includes:
when the output power of the direct current generator is larger than or equal to a preset first power threshold value, a preset first output voltage threshold value is obtained;
when the output voltage of the direct current generator is larger than the first output voltage threshold value, controlling a stepping motor of the engine to be motionless, keeping the original accelerator opening degree, and reducing the output voltage of the direct current generator according to a preset amplitude;
When the output voltage of the direct current generator is smaller than the first output voltage threshold value, a stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, a carburetor of the engine is controlled to increase an accelerator, and the output voltage of the direct current generator driven by the engine is increased;
when the output power of the direct current generator is smaller than the first power threshold value, a preset second output voltage threshold value is obtained;
when the output voltage of the direct current generator is smaller than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, and the carburetor of the engine is controlled to increase the throttle so as to increase the output voltage of the direct current generator driven by the engine;
when the output voltage of the direct current generator is larger than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate clockwise by a preset angle, and the carburetor of the engine is controlled to keep the opening degree of the throttle, so that the output voltage of the direct current generator driven by the engine is kept in a minimum output state;
the first output voltage threshold is greater than the second output voltage threshold.
Preferably, the engine-driven direct-current generator control method further includes:
step S5: acquiring a plurality of preset fault detection tasks, acquiring first operation data of the direct current generator driven by the engine, sequencing the fault detection tasks based on the first operation data, sequentially executing the corresponding fault detection tasks according to a sequencing order after sequencing, and outputting an execution result;
In the step S5, the sorting the fault detection tasks based on the first operation data includes:
acquiring second operation data of a plurality of other users of the same-model engine-driven direct-current generators;
extracting a plurality of first features of the first operation data and a plurality of second features of the second operation data respectively based on a feature extraction technique;
matching the first feature with the second feature, and if the matching is met, outputting the feature type of the second feature met by matching and a matching value between the second feature met by matching and the corresponding first feature;
inquiring a preset value degree comparison table, and determining the value degree commonly corresponding to the feature type and the matching value;
and calculating an evaluation index based on the value degree, wherein the calculation formula is as follows:
wherein γ is the evaluation index, d i For the ith said value, n is the total number of said values, σ i As intermediate variable d 0 A value threshold value is preset;
if the evaluation index is greater than or equal to a preset evaluation index threshold, performing characteristic association on the corresponding second operation data and the first operation data;
Integrating all the second operation data and the first operation data which are subjected to characteristic association with the first operation data to obtain operation big data;
selecting any fault detection task, inquiring a preset fault characteristic comparison table, and determining a plurality of fault characteristics corresponding to the selected fault detection task;
inquiring a preset associated fault feature comparison table, and determining a plurality of associated fault features corresponding to the fault features;
acquiring a preset judging model, judging the fault characteristics and the proportion situation of the corresponding associated fault characteristics in the running big data through the judging model, and outputting a judging value;
and calculating a judgment index based on the judgment value, wherein the calculation formula is as follows:
wherein ρ is the decision index, p t,x D, outputting the judging value for the judging model when judging the duty ratio condition of the nth fault feature corresponding to the xth associated fault feature in the operation big data t For the determination value, Q, which the determination model outputs in determining the duty ratio of the t-th fault feature in the operation big data t For the t th fault feature, the total number of the associated fault features is corresponding, and O is the total number of the fault features;
And sequencing each fault detection task from large to small based on the corresponding judgment index.
The embodiment of the invention provides a control system of an engine-driven direct-current generator, which comprises the following components:
the detection module is used for executing the step S1: when the engine drives the generator to output voltage, detecting whether a carburetor throttle of the engine reaches the maximum, if so, executing the step S2;
the first control module is configured to execute step S2: starting intervention, controlling the output voltage of a direct current generator driven by an engine to be reduced once by a preset amplitude, and detecting whether the carburetor throttle of the engine reaches the maximum again after the reduction, if so, executing the step S3, otherwise, executing the step S4;
the second control module is configured to execute step S3: controlling the output voltage of the direct current generator driven by the engine to be reduced once again by a preset amplitude, and executing the step S4 after the output voltage is reduced;
the third control module is configured to execute step S4: and stopping intervention when the output voltage of the direct current generator is smaller than or equal to a preset first power threshold value.
Preferably, the preset amplitude is reduced by 8%.
Preferably, the preset first output voltage threshold is 75% of the output voltage of the dc generator.
Preferably, the engine-driven direct-current generator control system further comprises:
a fourth control module;
the fourth control module performs the following operations:
when the output power of the direct current generator is larger than or equal to a preset first power threshold value, a preset first output voltage threshold value is obtained;
when the output voltage of the direct current generator is larger than the first output voltage threshold value, controlling a stepping motor of the engine to be motionless, keeping the original accelerator opening degree, and reducing the output voltage of the direct current generator according to a preset amplitude;
when the output voltage of the direct current generator is smaller than the first output voltage threshold value, a stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, a carburetor of the engine is controlled to increase an accelerator, and the output voltage of the direct current generator driven by the engine is increased;
when the output power of the direct current generator is smaller than the first power threshold value, a preset second output voltage threshold value is obtained;
when the output voltage of the direct current generator is smaller than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, and the carburetor of the engine is controlled to increase the throttle so as to increase the output voltage of the direct current generator driven by the engine;
When the output voltage of the direct current generator is larger than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate clockwise by a preset angle, and the carburetor of the engine is controlled to keep the opening degree of the throttle, so that the output voltage of the direct current generator driven by the engine is kept in a minimum output state;
the first output voltage threshold is greater than the second output voltage threshold.
Preferably, the engine-driven direct-current generator control system further comprises:
the fault detection module is configured to execute step S5: acquiring a plurality of preset fault detection tasks, acquiring first operation data of the direct current generator driven by the engine, sequencing the fault detection tasks based on the first operation data, sequentially executing the corresponding fault detection tasks according to a sequencing order after sequencing, and outputting an execution result;
the fault detection module performs the following operations:
acquiring second operation data of a plurality of other users of the same-model engine-driven direct-current generators;
extracting a plurality of first features of the first operation data and a plurality of second features of the second operation data respectively based on a feature extraction technique;
matching the first feature with the second feature, and if the matching is met, outputting the feature type of the second feature met by matching and a matching value between the second feature met by matching and the corresponding first feature;
Inquiring a preset value degree comparison table, and determining the value degree commonly corresponding to the feature type and the matching value;
and calculating an evaluation index based on the value degree, wherein the calculation formula is as follows:
wherein γ is the evaluation index, d i Is the ith oneValue, n is the total number of the value, sigma i As intermediate variable d 0 A value threshold value is preset;
if the evaluation index is greater than or equal to a preset evaluation index threshold, performing characteristic association on the corresponding second operation data and the first operation data;
integrating all the second operation data and the first operation data which are subjected to characteristic association with the first operation data to obtain operation big data;
selecting any fault detection task, inquiring a preset fault characteristic comparison table, and determining a plurality of fault characteristics corresponding to the selected fault detection task;
inquiring a preset associated fault feature comparison table, and determining a plurality of associated fault features corresponding to the fault features;
acquiring a preset judging model, judging the fault characteristics and the proportion situation of the corresponding associated fault characteristics in the running big data through the judging model, and outputting a judging value;
And calculating a judgment index based on the judgment value, wherein the calculation formula is as follows:
wherein ρ is the decision index, p t,x D, outputting the judging value for the judging model when judging the duty ratio condition of the nth fault feature corresponding to the xth associated fault feature in the operation big data t For the determination value, Q, which the determination model outputs in determining the duty ratio of the t-th fault feature in the operation big data t For the t th fault feature, the total number of the associated fault features is corresponding, and O is the total number of the fault features;
and sequencing each fault detection task from large to small based on the corresponding judgment index.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a method of controlling an engine-driven DC generator according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an engine-driven alternator control system according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides a control method of an engine-driven direct-current generator, as shown in fig. 1, comprising the following steps:
step S1: when the engine drives the generator to output voltage, detecting whether a carburetor throttle of the engine reaches the maximum, if so, executing the step S2;
step S2: starting intervention, controlling the output voltage of a direct current generator driven by an engine to be reduced once by a preset amplitude, and detecting whether the carburetor throttle of the engine reaches the maximum again after the reduction, if so, executing the step S3, otherwise, executing the step S4;
step S3: controlling the output voltage of the direct current generator driven by the engine to be reduced once again by a preset amplitude, and executing the step S4 after the output voltage is reduced;
step S4: and stopping intervention when the output voltage of the direct current generator is smaller than or equal to a preset first output voltage threshold value.
The working principle and the beneficial effects of the technical scheme are as follows:
in general, when the controller detects that the output voltage U1 of the variable frequency direct current generator is smaller than the set voltage U2 thereof, the stepping motor is controlled to rotate anticlockwise so as to increase the throttle of the carburetor, the engine speed is increased, and then the output voltage U1 of the variable frequency direct current generator is increased, in the process, in order to avoid that the variable frequency direct current generator is always in an overload state due to overlarge load, the output voltage U1 of the variable frequency direct current generator is always smaller than the set voltage U2 thereof, the stepping motor still always works when the throttle of the carburetor reaches the maximum, therefore, whether the throttle of the carburetor reaches the maximum is detected, if so, intervention is started, the output voltage of the variable frequency direct current generator is controlled to be reduced once by a preset amplitude (8 percent is reduced), after the reduction, in general, after the reduction of the output voltage of the variable frequency direct current generator is reduced, the throttle of the carburetor is reduced (the output voltage is reduced, the system considers that the load is reduced, and not needed, and if not needed, the throttle of the variable frequency direct current generator is seriously, the control the output voltage of the variable frequency direct current generator is always works when the preset amplitude is reduced by a preset amplitude (8 percent, and finally, the power is not required to be reduced by the power is reduced by the preset power), and the power is required to be turned off for the first time, and the air conditioner is actually, if the power is reduced, and is not needed;
According to the embodiment of the invention, when the maximum throttle of the carburetor is detected, intervention is started, the output voltage of the variable-frequency direct-current generator is reduced, the throttle of the carburetor is reduced, the stepping motor does not work all the time, electric energy is saved, heating is reduced, in addition, after the output voltage of the variable-frequency direct-current generator is reduced, the engine-driven engine-closed condition when the throttle is always in the maximum state can be avoided, and the service lives of the stepping motor, the engine driven engine and the variable-frequency direct-current generator are prolonged.
The embodiment of the invention provides a control method of an engine-driven direct-current generator, wherein the preset amplitude is reduced by 8%.
The working principle and the beneficial effects of the technical scheme are as follows: the preset amplitude is specifically 8% drop.
The embodiment of the invention provides a control method of a direct current generator driven by an engine, wherein the preset first output voltage threshold is 75% of the output voltage of the direct current generator.
The working principle and the beneficial effects of the technical scheme are as follows: the preset first power threshold is in particular 75% of the output voltage of the dc generator.
The embodiment of the invention provides a control method of a direct current generator driven by an engine, which further comprises the following steps:
When the output power of the direct current generator is larger than or equal to a preset first power threshold value, a preset first output voltage threshold value is obtained;
when the output voltage of the direct current generator is larger than the first output voltage threshold value, controlling a stepping motor of the engine to be motionless, keeping the original accelerator opening degree, and reducing the output voltage of the direct current generator according to a preset amplitude;
when the output voltage of the direct current generator is smaller than the first output voltage threshold value, a stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, a carburetor of the engine is controlled to increase an accelerator, and the output voltage of the direct current generator driven by the engine is increased;
when the output power of the direct current generator is smaller than the first power threshold value, a preset second output voltage threshold value is obtained;
when the output voltage of the direct current generator is smaller than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, and the carburetor of the engine is controlled to increase the throttle so as to increase the output voltage of the direct current generator driven by the engine;
when the output voltage of the direct current generator is larger than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate clockwise by a preset angle, and the carburetor of the engine is controlled to keep the opening degree of the throttle, so that the output voltage of the direct current generator driven by the engine is kept in a minimum output state;
The first output voltage threshold is greater than the second output voltage threshold.
The working principle and the beneficial effects of the technical scheme are as follows:
the preset second power threshold is specifically: 75% of the output power of the direct current generator, and the preset first output voltage threshold is specifically: for example, 26V; the preset second output voltage threshold is specifically: for example, 25V; the preset angle is an angle value;
at present, the general set voltage U2 is 26V, when the output voltage of the direct current generator is smaller than or equal to a first output voltage threshold value, the set voltage U2 = 26V, when the load of the direct current generator is smaller, the direct current generator can work according to the original rule, when the load power is larger than a second power threshold value, the set voltage U2 is reduced, namely when the load of the direct current generator is overlarge, the set voltage U2 is reduced, so that the output voltage U1 of the variable frequency direct current generator is more easily larger than the set voltage U2, namely, the system can quickly control the stepper motor to rotate clockwise according to the original rule, the carburetor is controlled to reduce the throttle, the stepper motor can not work all the time, the electric energy is saved, the heating is reduced, in addition, after the output voltage of the variable frequency direct current generator is reduced, the situation that the engine driven by the throttle is closed can be avoided when the throttle is always in the maximum state, the service lives of the stepper motor, the engine driven by the engine and the variable frequency direct current generator are prolonged, in addition, the output voltage of the variable frequency direct current generator is reduced, the charging current of the direct current generator is reduced, and the battery can be protected to a certain extent; the scheme is a parallel technical scheme.
The embodiment of the invention provides a control method of a direct current generator driven by an engine, which further comprises the following steps:
step S5: acquiring a plurality of preset fault detection tasks, acquiring first operation data of the direct current generator driven by the engine, sequencing the fault detection tasks based on the first operation data, sequentially executing the corresponding fault detection tasks according to a sequencing order after sequencing, and outputting an execution result;
in the step S5, the sorting the fault detection tasks based on the first operation data includes:
acquiring second operation data of a plurality of other users of the same-model engine-driven direct-current generators;
extracting a plurality of first features of the first operation data and a plurality of second features of the second operation data respectively based on a feature extraction technique;
matching the first feature with the second feature, and if the matching is met, outputting the feature type of the second feature met by matching and a matching value between the second feature met by matching and the corresponding first feature;
inquiring a preset value degree comparison table, and determining the value degree commonly corresponding to the feature type and the matching value;
And calculating an evaluation index based on the value degree, wherein the calculation formula is as follows:
wherein γ is the evaluation index, d i For the ith said value, n is the total number of said values, σ i As intermediate variable d 0 A value threshold value is preset;
if the evaluation index is greater than or equal to a preset evaluation index threshold, performing characteristic association on the corresponding second operation data and the first operation data;
integrating all the second operation data and the first operation data which are subjected to characteristic association with the first operation data to obtain operation big data;
selecting any fault detection task, inquiring a preset fault characteristic comparison table, and determining a plurality of fault characteristics corresponding to the selected fault detection task;
inquiring a preset associated fault feature comparison table, and determining a plurality of associated fault features corresponding to the fault features;
acquiring a preset judging model, judging the fault characteristics and the proportion situation of the corresponding associated fault characteristics in the running big data through the judging model, and outputting a judging value;
and calculating a judgment index based on the judgment value, wherein the calculation formula is as follows:
wherein ρ is the decision index, p t,x D, outputting the judging value for the judging model when judging the duty ratio condition of the nth fault feature corresponding to the xth associated fault feature in the operation big data t For the determination value, Q, which the determination model outputs in determining the duty ratio of the t-th fault feature in the operation big data t For the t th fault feature, the total number of the associated fault features is corresponding, and O is the total number of the fault features;
and sequencing each fault detection task from large to small based on the corresponding judgment index.
The working principle and the beneficial effects of the technical scheme are as follows:
the preset multiple fault detection tasks specifically include: for example, whether there is a problem of small charging current, whether there is a problem of excessive charging current, whether there is a problem of unstable charging current, or the like; the preset value degree comparison table specifically comprises the following steps: the background personnel make a comparison table in advance based on different feature types and matching values, each comparison column comprises a feature type and matching value interval, when in comparison, each feature type and matching value (corresponding to the corresponding matching value interval) jointly correspond to one value degree, and the higher the value degree, the higher the reference value of the feature type is, and/or the degree of the feature type jointly occurring in the first operation data and the second operation data is also higher; the preset value threshold is specifically: for example 88; the preset evaluation index threshold value specifically comprises the following steps: for example, 97; the preset fault characteristic comparison table specifically comprises: the background personnel count fault characteristics which can occur under each fault detection task in advance and then make a table; the preset correlation fault characteristic comparison table specifically comprises the following steps: the method is also manufactured in advance by background personnel, and the related fault characteristics (the recording forms of each fault characteristic are different due to the different recording habits of staff and the like) related to the fault characteristics which can occur under each fault detection task are counted and then tabulated; the preset judging model specifically comprises the following steps: the machine learning algorithm is utilized to carry out a model generated after learning based on a large number of manual judgment records, the model can judge the proportion of the fault characteristics and the corresponding associated fault characteristics in the data, a judgment value is output, and the larger the judgment value is, the higher the proportion is;
The purpose of ordering the fault detection tasks is to arrange the fault detection tasks which are easy to detect faults to the front, and the fault detection efficiency is improved by preferentially proceeding, so that statistics can be carried out based on working data of the direct current generator driven by the engine and self fault detection records and the like [ first operation data ], the possibility of detecting the faults of each fault detection task is determined, but the problems of contingency, limitation and the like are caused only by the first operation data, the possibility of detecting the faults of each fault detection task cannot be comprehensively determined, therefore, the working data of the direct current generator driven by other users with the same model and the second operation data of the self fault detection record can be obtained, the auxiliary determination can be carried out, however, because of different use habits and other reasons, different faults are caused between the direct current generators driven by the engine, the acquired second operation data are required to be screened, the characteristics of each working data in the first operation data and the second operation data are extracted, if the characteristics of the first operation data and the second operation data are matched, the characteristics of the first operation data and the second operation data are matched with the second operation data are determined, and the value is equal to the first operation index and the second operation index is calculated and the value is higher than the threshold value is determined based on the first operation index and the characteristics and the first operation index and the second operation data is matched with the second operation data and the first operation data and the second operation data has the different to have the different values, acquiring operation big data, and determining the possibility of detecting faults of each fault detection task based on the operation big data; each fault detection task corresponds to a plurality of fault characteristics, each fault characteristic also corresponds to a plurality of associated fault characteristics due to different recording modes, judgment is carried out based on a judgment model, and a judgment index is calculated based on a judgment value output by the judgment model, and the larger the judgment index is, the greater the possibility of fault detection corresponding to the fault detection task is, and the fault detection task should be arranged to the front;
Before executing a plurality of fault detection tasks, the embodiment of the invention sequences the fault detection tasks, and arranges the fault detection tasks which are more likely to detect faults to the front, thereby greatly improving the working efficiency of the system and being very intelligent.
An embodiment of the present invention provides an engine-driven direct current generator control system, as shown in fig. 2, including:
a detection module 1, configured to perform step S1: when the engine drives the generator to output voltage, detecting whether a carburetor throttle of the engine reaches the maximum, if so, executing the step S2;
a first control module 2 for executing step S2: starting intervention, controlling the output voltage of a direct current generator driven by an engine to be reduced once by a preset amplitude, and detecting whether the carburetor throttle of the engine reaches the maximum again after the reduction, if so, executing the step S3, otherwise, executing the step S4;
a second control module 3, configured to execute step S3: controlling the output voltage of the direct current generator driven by the engine to be reduced once again by a preset amplitude, and executing the step S4 after the output voltage is reduced;
a third control module 4, configured to execute step S4: and stopping intervention when the output voltage of the direct current generator is smaller than or equal to a preset first output voltage threshold value.
The working principle and the beneficial effects of the technical scheme are as follows:
in general, when the controller detects that the output voltage U1 of the variable frequency direct current generator is smaller than the set voltage U2 thereof, the stepping motor is controlled to rotate anticlockwise so as to increase the throttle of the carburetor, the engine speed is increased, and then the output voltage U1 of the variable frequency direct current generator is increased, in the process, in order to avoid that the variable frequency direct current generator is always in an overload state due to overlarge load, the output voltage U1 of the variable frequency direct current generator is always smaller than the set voltage U2 thereof, the stepping motor still always works when the throttle of the carburetor is maximum, therefore, whether the throttle of the carburetor is maximum is detected, if so, intervention is started, the output voltage of the variable frequency direct current generator is controlled to be reduced by a preset amplitude (8 percent is reduced) once (when the output of the variable frequency direct current generator is reduced), after the reduction, in general cases, the throttle of the carburetor is reduced (the output voltage is reduced, the system considers that the load is reduced, and not needed), whether the throttle of the carburetor reaches the maximum is detected again, and if not, the variable frequency direct current generator is serious, the output voltage of the variable frequency direct current generator is controlled to be in preset amplitude (8 percent is reduced, and finally, the power is required to be reduced by a preset amplitude, and the power is reduced by more than 75 percent when the power is required to be supplied by the air conditioner, and the power is required to be stopped, and the power is actually, if the power is reduced by the power of the variable frequency direct current generator (if the power generator is reduced), and is required to be more than 75 percent);
According to the embodiment of the invention, when the maximum throttle of the carburetor is detected, intervention is started, the output voltage of the variable-frequency direct-current generator is reduced, the throttle of the carburetor is reduced, the stepping motor does not work all the time, electric energy is saved, heating is reduced, in addition, after the output voltage of the variable-frequency direct-current generator is reduced, the engine-driven engine-closed condition when the throttle is always in the maximum state can be avoided, and the service lives of the stepping motor, the engine driven engine and the variable-frequency direct-current generator are prolonged.
The embodiment of the invention provides a direct-current generator control system driven by an engine, wherein the preset amplitude is reduced by 8%.
The working principle and the beneficial effects of the technical scheme are as follows: the preset amplitude is specifically 8% drop.
The embodiment of the invention provides an engine-driven direct-current generator control system, wherein the preset first power threshold is 75% of rated power of the direct-current generator.
The working principle and the beneficial effects of the technical scheme are as follows: the preset first power threshold is specifically 75% of the rated power of the direct-current generator.
The embodiment of the invention provides a control system of a direct current generator driven by an engine, which further comprises:
A fourth control module;
the fourth control module performs the following operations:
when the output power of the direct current generator is larger than or equal to a preset first power threshold value, a preset first output voltage threshold value is obtained;
when the output voltage of the direct current generator is larger than the first output voltage threshold value, controlling a stepping motor of the engine to be motionless, keeping the original accelerator opening degree, and reducing the output voltage of the direct current generator according to a preset amplitude;
when the output voltage of the direct current generator is smaller than the first output voltage threshold value, a stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, a carburetor of the engine is controlled to increase an accelerator, and the output voltage of the direct current generator driven by the engine is increased;
when the output power of the direct current generator is smaller than the first power threshold value, a preset second output voltage threshold value is obtained;
when the output voltage of the direct current generator is smaller than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, and the carburetor of the engine is controlled to increase the throttle so as to increase the output voltage of the direct current generator driven by the engine;
when the output voltage of the direct current generator is larger than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate clockwise by a preset angle, and the carburetor of the engine is controlled to keep the opening degree of the throttle, so that the output voltage of the direct current generator driven by the engine is kept in a minimum output state;
The first output voltage threshold is greater than the second output voltage threshold.
The working principle and the beneficial effects of the technical scheme are as follows:
the preset second power threshold is specifically: the rated power of the direct current generator is 75%, and the preset first output voltage threshold value is specifically: for example, 26V; the preset second output voltage threshold is specifically: for example, 25V; the preset angle is an angle value;
at present, the general set voltage U2 is 26V, when the output voltage of the direct current generator is smaller than or equal to the second power threshold value, the set voltage U2=26V, when the load of the direct current generator is smaller, the direct current generator can work according to the original rule, when the load power is larger than the second power threshold value, the set voltage U2 is reduced, namely when the load of the direct current generator is overlarge, the set voltage U2 is reduced, so that the output voltage U1 of the variable frequency direct current generator is more easily larger than the set voltage U2, namely, the system can quickly control the stepper motor to rotate clockwise according to the original rule, the carburetor is controlled to reduce the throttle, the stepper motor can not work all the time, the electric energy is saved, the heating is reduced, in addition, after the output voltage of the variable frequency direct current generator is reduced, the situation that the engine driven by the throttle is closed can be avoided when the throttle is always in the maximum state, the service lives of the stepper motor, the engine driven by the engine and the variable frequency direct current generator are prolonged, in addition, the output voltage of the variable frequency direct current generator is reduced, the charging current of a storage battery of an automobile is reduced, and the battery can be protected to a certain extent; the scheme is a parallel technical scheme.
The embodiment of the invention provides a control system of a direct current generator driven by an engine, which further comprises:
the fault detection module 1 is configured to execute step S5: acquiring a plurality of preset fault detection tasks, acquiring first operation data of the direct current generator driven by the engine, sequencing the fault detection tasks based on the first operation data, sequentially executing the corresponding fault detection tasks according to a sequencing order after sequencing, and outputting an execution result;
the fault detection module 1 performs the following operations:
acquiring second operation data of a plurality of other users of the same-model engine-driven direct-current generators;
extracting a plurality of first features of the first operation data and a plurality of second features of the second operation data respectively based on a feature extraction technique;
matching the first feature with the second feature, and if the matching is met, outputting the feature type of the second feature met by matching and a matching value between the second feature met by matching and the corresponding first feature;
inquiring a preset value degree comparison table, and determining the value degree commonly corresponding to the feature type and the matching value;
and calculating an evaluation index based on the value degree, wherein the calculation formula is as follows:
Wherein γ is the evaluation index, d i For the ith said value, n is the total number of said values, σ i As intermediate variable d 0 A value threshold value is preset;
if the evaluation index is greater than or equal to a preset evaluation index threshold, performing characteristic association on the corresponding second operation data and the first operation data;
integrating all the second operation data and the first operation data which are subjected to characteristic association with the first operation data to obtain operation big data;
selecting any fault detection task, inquiring a preset fault characteristic comparison table, and determining a plurality of fault characteristics corresponding to the selected fault detection task;
inquiring a preset associated fault feature comparison table, and determining a plurality of associated fault features corresponding to the fault features;
acquiring a preset judging model, judging the fault characteristics and the proportion situation of the corresponding associated fault characteristics in the running big data through the judging model, and outputting a judging value;
and calculating a judgment index based on the judgment value, wherein the calculation formula is as follows:
wherein ρ is the decision index, p t,x D, outputting the judging value for the judging model when judging the duty ratio condition of the nth fault feature corresponding to the xth associated fault feature in the operation big data t For the determination value, Q, which the determination model outputs in determining the duty ratio of the t-th fault feature in the operation big data t For the t th fault feature, the total number of the associated fault features is corresponding, and O is the total number of the fault features;
and sequencing each fault detection task from large to small based on the corresponding judgment index.
The working principle and the beneficial effects of the technical scheme are as follows:
the preset multiple fault detection tasks specifically include: for example, whether there is a problem of small charging current, whether there is a problem of excessive charging current, whether there is a problem of unstable charging current, or the like; the preset value degree comparison table specifically comprises the following steps: the background personnel make a comparison table in advance based on different feature types and matching values, each comparison column comprises a feature type and matching value interval, when in comparison, each feature type and matching value (corresponding to the corresponding matching value interval) jointly correspond to one value degree, and the higher the value degree, the higher the reference value of the feature type is, and/or the degree of the feature type jointly occurring in the first operation data and the second operation data is also higher; the preset value threshold is specifically: for example 88; the preset evaluation index threshold value specifically comprises the following steps: for example, 97; the preset fault characteristic comparison table specifically comprises: the background personnel count fault characteristics which can occur under each fault detection task in advance and then make a table; the preset correlation fault characteristic comparison table specifically comprises the following steps: the method is also manufactured in advance by background personnel, and the related fault characteristics (the recording forms of each fault characteristic are different due to the different recording habits of staff and the like) related to the fault characteristics which can occur under each fault detection task are counted and then tabulated; the preset judging model specifically comprises the following steps: the machine learning algorithm is utilized to carry out a model generated after learning based on a large number of manual judgment records, the model can judge the proportion of the fault characteristics and the corresponding associated fault characteristics in the data, a judgment value is output, and the larger the judgment value is, the higher the proportion is;
The purpose of ordering the fault detection tasks is to arrange the fault detection tasks which are easy to detect faults to the front, and the fault detection efficiency is improved by preferentially proceeding, so that statistics can be carried out based on working data of the direct current generator driven by the engine and self fault detection records and the like [ first operation data ], the possibility of detecting the faults of each fault detection task is determined, but the problems of contingency, limitation and the like are caused only by the first operation data, the possibility of detecting the faults of each fault detection task cannot be comprehensively determined, therefore, the working data of the direct current generator driven by other users with the same model and the second operation data of the self fault detection record can be obtained, the auxiliary determination can be carried out, however, because of different use habits and other reasons, different faults are caused between the direct current generators driven by the engine, the acquired second operation data are required to be screened, the characteristics of each working data in the first operation data and the second operation data are extracted, if the characteristics of the first operation data and the second operation data are matched, the characteristics of the first operation data and the second operation data are matched with the second operation data are determined, and the value is equal to the first operation index and the second operation index is calculated and the value is higher than the threshold value is determined based on the first operation index and the characteristics and the first operation index and the second operation data is matched with the second operation data and the first operation data and the second operation data has the different to have the different values, acquiring operation big data, and determining the possibility of detecting faults of each fault detection task based on the operation big data; each fault detection task corresponds to a plurality of fault characteristics, each fault characteristic also corresponds to a plurality of associated fault characteristics due to different recording modes, judgment is carried out based on a judgment model, and a judgment index is calculated based on a judgment value output by the judgment model, and the larger the judgment index is, the greater the possibility of fault detection corresponding to the fault detection task is, and the fault detection task should be arranged to the front;
Before executing a plurality of fault detection tasks, the embodiment of the invention sequences the fault detection tasks, and arranges the fault detection tasks which are more likely to detect faults to the front, thereby greatly improving the working efficiency of the system and being very intelligent.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A method of controlling an engine-driven direct current generator, comprising:
step S1: when the output voltage of the generator is the same, detecting whether the carburetor throttle of the engine reaches the maximum, if so, executing the step S2;
step S2: starting intervention, controlling the output voltage of a direct current generator driven by an engine to be reduced once by a preset amplitude, and detecting whether the carburetor throttle of the engine reaches the maximum again after the reduction, if so, executing the step S3, otherwise, executing the step S4;
step S3: controlling the output voltage of the direct current generator driven by the engine to be reduced once again by a preset amplitude, and executing the step S4 after the output voltage is reduced;
Step S4: and stopping intervening the direct current generator when the output voltage of the direct current generator is smaller than or equal to a preset first output voltage threshold value.
2. An engine-driven direct current generator control method according to claim 1, wherein the preset amplitude is reduced by 8%.
3. An engine-driven alternator control method as in claim 1 wherein the predetermined first output voltage threshold is 75% of the alternator output voltage.
4. An engine-driven direct-current generator control method as set forth in claim 1, further comprising:
when the output power of the direct current generator is larger than or equal to a preset first power threshold value, a preset first output voltage threshold value is obtained;
when the output voltage of the direct current generator is larger than the first output voltage threshold value, controlling a stepping motor of the engine to be motionless, keeping the original accelerator opening degree, and reducing the output voltage of the direct current generator according to a preset amplitude;
when the output voltage of the direct current generator is smaller than the first output voltage threshold value, a stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, a carburetor of the engine is controlled to increase an accelerator, and the output voltage of the direct current generator driven by the engine is increased;
When the output power of the direct current generator is smaller than the first power threshold value, a preset second output voltage threshold value is obtained;
when the output voltage of the direct current generator is smaller than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, and the carburetor of the engine is controlled to increase the throttle so as to increase the output voltage of the direct current generator driven by the engine;
when the output voltage of the direct current generator is larger than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate clockwise by a preset angle, and the carburetor of the engine is controlled to keep the opening degree of the throttle, so that the output voltage of the direct current generator driven by the engine is kept in a minimum output state;
the first output voltage threshold is greater than the second output voltage threshold.
5. An engine-driven direct-current generator control method as set forth in claim 1, further comprising:
step S5: acquiring a plurality of preset fault detection tasks, acquiring first operation data of the direct current generator driven by the engine, sequencing the fault detection tasks based on the first operation data, sequentially executing the corresponding fault detection tasks according to a sequencing order after sequencing, and outputting an execution result;
In the step S5, the sorting the fault detection tasks based on the first operation data includes:
acquiring second operation data of a plurality of other users of the same-model engine-driven direct-current generators;
extracting a plurality of first features of the first operation data and a plurality of second features of the second operation data respectively based on a feature extraction technique;
matching the first feature with the second feature, and if the matching is met, outputting the feature type of the second feature met by matching and a matching value between the second feature met by matching and the corresponding first feature;
inquiring a preset value degree comparison table, and determining the value degree commonly corresponding to the feature type and the matching value;
and calculating an evaluation index based on the value degree, wherein the calculation formula is as follows:
wherein γ is the evaluation index, d i For the ith said value, n is the total number of said values, σ i As intermediate variable d 0 A value threshold value is preset;
if the evaluation index is greater than or equal to a preset evaluation index threshold, performing characteristic association on the corresponding second operation data and the first operation data;
Integrating all the second operation data and the first operation data which are subjected to characteristic association with the first operation data to obtain operation big data;
selecting any fault detection task, inquiring a preset fault characteristic comparison table, and determining a plurality of fault characteristics corresponding to the selected fault detection task;
inquiring a preset associated fault feature comparison table, and determining a plurality of associated fault features corresponding to the fault features;
acquiring a preset judging model, judging the fault characteristics and the proportion situation of the corresponding associated fault characteristics in the running big data through the judging model, and outputting a judging value;
and calculating a judgment index based on the judgment value, wherein the calculation formula is as follows:
wherein ρ is the decision index, p t,x D, outputting the judging value for the judging model when judging the duty ratio condition of the nth fault feature corresponding to the xth associated fault feature in the operation big data t For the determination value, Q, which the determination model outputs in determining the duty ratio of the t-th fault feature in the operation big data t For the t th fault feature, the total number of the associated fault features is corresponding, and O is the total number of the fault features;
And sequencing each fault detection task from large to small based on the corresponding judgment index.
6. An engine-driven direct current generator control system, comprising:
the detection module is used for executing the step S1: when the engine drives the generator to output voltage, detecting whether a carburetor throttle of the engine reaches the maximum, if so, executing the step S2;
the first control module is configured to execute step S2: starting intervention, controlling the output voltage of a direct current generator driven by an engine to be reduced once by a preset amplitude, and detecting whether the carburetor throttle of the engine reaches the maximum again after the reduction, if so, executing the step S3, otherwise, executing the step S4;
the second control module is configured to execute step S3: controlling the output voltage of the direct current generator driven by the engine to be reduced once again by a preset amplitude, and executing the step S4 after the output voltage is reduced;
the third control module is configured to execute step S4: and stopping intervening the direct current generator when the output voltage of the direct current generator is smaller than or equal to a preset first output voltage threshold value.
7. An engine-driven direct current generator control system according to claim 6 wherein said predetermined magnitude is 8% decrease.
8. An engine-driven alternator control system as in claim 6 wherein the predetermined first output voltage threshold is 75% of the alternator output voltage.
9. An engine-driven direct current generator control system according to claim 6 and further comprising:
a fourth control module;
the fourth control module performs the following operations:
when the output power of the direct current generator is larger than or equal to a preset first power threshold value, a preset first output voltage threshold value is obtained;
when the output voltage of the direct current generator is larger than the first output voltage threshold value, controlling a stepping motor of the engine to be motionless, keeping the original accelerator opening degree, and reducing the output voltage of the direct current generator according to a preset amplitude;
when the output voltage of the direct current generator is smaller than the first output voltage threshold value, a stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, a carburetor of the engine is controlled to increase an accelerator, and the output voltage of the direct current generator driven by the engine is increased;
when the output power of the direct current generator is smaller than the first power threshold value, a preset second output voltage threshold value is obtained;
When the output voltage of the direct current generator is smaller than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate anticlockwise by a preset angle, and the carburetor of the engine is controlled to increase the throttle so as to increase the output voltage of the direct current generator driven by the engine;
when the output voltage of the direct current generator is larger than the second output voltage threshold value, the stepping motor of the engine is controlled to rotate clockwise by a preset angle, and the carburetor of the engine is controlled to keep the opening degree of the throttle, so that the output voltage of the direct current generator driven by the engine is kept in a minimum output state;
the first output voltage threshold is greater than the second output voltage threshold.
10. An engine-driven direct current generator control system according to claim 6 and further comprising:
the fault detection module is configured to execute step S5: acquiring a plurality of preset fault detection tasks, acquiring first operation data of the direct current generator driven by the engine, sequencing the fault detection tasks based on the first operation data, sequentially executing the corresponding fault detection tasks according to a sequencing order after sequencing, and outputting an execution result;
the fault detection module performs the following operations:
Acquiring second operation data of a plurality of other users of the same-model engine-driven direct-current generators;
extracting a plurality of first features of the first operation data and a plurality of second features of the second operation data respectively based on a feature extraction technique;
matching the first feature with the second feature, and if the matching is met, outputting the feature type of the second feature met by matching and a matching value between the second feature met by matching and the corresponding first feature;
inquiring a preset value degree comparison table, and determining the value degree commonly corresponding to the feature type and the matching value;
and calculating an evaluation index based on the value degree, wherein the calculation formula is as follows:
wherein γ is the evaluation index, d i For the ith said value, n is the total number of said values, σ i As intermediate variable d 0 A value threshold value is preset;
if the evaluation index is greater than or equal to a preset evaluation index threshold, performing characteristic association on the corresponding second operation data and the first operation data;
integrating all the second operation data and the first operation data which are subjected to characteristic association with the first operation data to obtain operation big data;
Selecting any fault detection task, inquiring a preset fault characteristic comparison table, and determining a plurality of fault characteristics corresponding to the selected fault detection task;
inquiring a preset associated fault feature comparison table, and determining a plurality of associated fault features corresponding to the fault features;
acquiring a preset judging model, judging the fault characteristics and the proportion situation of the corresponding associated fault characteristics in the running big data through the judging model, and outputting a judging value;
and calculating a judgment index based on the judgment value, wherein the calculation formula is as follows:
wherein ρ is the decision index, p t,x D, outputting the judging value for the judging model when judging the duty ratio condition of the nth fault feature corresponding to the xth associated fault feature in the operation big data t For the determination value, Q, which the determination model outputs in determining the duty ratio of the t-th fault feature in the operation big data t For the t th fault feature, the total number of the associated fault features is corresponding, and O is the total number of the fault features;
and sequencing each fault detection task from large to small based on the corresponding judgment index.
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